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Subsea well production facility

Imported: 24 Feb '17 | Published: 06 Jan '04

Clay F. Anderson, John Allen

USPTO - Utility Patents

Abstract

A method and system for separating and treating water produced from a subsea well includes separating the water subsea, and then separating the water from residual hydrocarbons on a surface vessel. The water treated at the surface, can be dumped to sea or injected into other subsea wells. The residual hydrocarbons separated on the vessel can be conveyed subsea for transportation to a processing facility along with hydrocarbons from the subsea separator. Also, the residual hydrocarbons from the surface separator can be used to fuel gas powered equipment in order to drive other equipment or to generate electricity for the vessel.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a water treatment system constructed in accordance with the present invention.

FIG. 2 is a schematic diagram of a portion the water treatment system of FIG. 1 that is located on the vessel shown in FIG.

1.

FIG. 3 is a schematic diagram of an alternative embodiment of the water treatment system of FIG.

1.

FIG. 4 is a perspective view of alternative embodiment of the water treatment system of FIG.

3.

FIG. 5 is a schematic diagram of an alternative embodiment of the portion of the water treatment system of FIG.

2.

FIG. 6 is a perspective view of an alternative embodiment of the water treatment system of FIG.

1.

Claims

1. A method for producing a subsea well, comprising:

2. The method of claim 1, further comprising pumping the water after separation from the residual hydrocarbons to the sea.

3. The method of claim 1, further comprising mixing the water after the separation from the residual hydrocarbons with a supply of sea water, and injecting the mixture into another subsea well.

4. The method of claim 1, further comprising conveying the residual hydrocarbons after separation at the vessel to the subsea collector for conveyance to the remote processing facility.

5. The method of claim 4, further comprising with the separator on the vessel, separating gaseous hydrocarbons and liquid hydrocarbons from the residual hydrocarbons; and pumping the liquid hydrocarbons to the subsea collector.

6. The method of claim 5, further comprising with the separator on the vessel, separating gaseous hydrocarbons and liquid hydrocarbons from the residual hydrocarbons; and conveying the gaseous hydrocarbons to the subsea collector.

7. The method of claim 1, further comprising adding sea water to the gaseous residual hydrocarbons to form a hydrate slurry, then pumping the hydrate slurry to the subsea collector for conveyance to the remote processing facility.

8. The method of claim 1, further comprising:

9. The method of claim 1, further comprising:

10. The method of claim 9, further comprising supplying additional hydrocarbons to the gas powered apparatus by adding gaseous hydrocarbons to the separated water after separation with the subsea separator.

11. A method for producing a subsea well, comprising:

12. The method of claim 11, further comprising pumping the water separated from the residual hydrocarbons with the surface separator to the sea.

13. The method of claim 11, further comprising conveying the gaseous residual hydrocarbons from the surface separator to the subsea collector.

14. The method of claim 11, further comprising:

15. The method of claim 11, further comprising compressing the gaseous residual hydrocarbons after separation with the surface separator before conveying the gaseous residual hydrocarbons to the subsea collector.

16. The method of claim 11, further comprising adding sea water to the gaseous residual hydrocarbons after separation by the surface separator to form a hydrate slurry, then pumping the hydrate slurry with the liquid residual hydrocarbons to the subsea collector.

17. The method of claim 11, further comprising:

18. The method of claim 17, further comprising separating the hydrocarbons flowing from the subsea well to the subsea separator into liquid and gaseous hydrocarbons;

19. A well fluid treatment system, comprising: